linux-kernel - Re: [PATCH 0/6] usbip fixes to crashes found by syzbot

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Message-ID: <5baf6b94-72c4-6e69-65a5-35c5cfb8ca0e@i-love.sakura.ne.jp>
Date:   Thu, 11 Mar 2021 21:34:38 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Cc:     shuah@...nel.org, valentina.manea.m@...il.com,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] usbip fixes to crashes found by syzbot

On 2021/03/11 3:33, Greg KH wrote:
> On Sun, Mar 07, 2021 at 08:53:25PM -0700, Shuah Khan wrote:
>> This patch series fixes the following problems founds in syzbot
>> fuzzing.
> 
> Thanks for these, all now queued up.

I send SIGSTOP to

  [PATCH 4/6] usbip: fix stub_dev usbip_sockfd_store() races leading to gpf
  [PATCH 5/6] usbip: fix vhci_hcd attach_store() races leading to gpf
  [PATCH 6/6] usbip: fix vudc usbip_sockfd_store races leading to gpf

because these patches merely converted NULL pointer dererefence bug to use-after-free bug
by breaking kthread_get_run() into kthread_create()/get_task_struct()/wake_up_process().